GB/T 39631-2020General specification for servo motor systems in air conditioning compressors (English PDF)

4.2 Environmental conditions

4.2.1 Environmental conditions for use Unless otherwise specified, the environmental conditions for the use of the system shall comply with: -- Environmental medium: refrigerant and lubricating oil (refrigerant shall be R134a, R407C, R410A, R1234yf or as specified by product-specific technical conditions; lubricating oil shall be POE, PAG, PVE, FVC or as specified by product-specific technical conditions); -- Operating environment temperature: it is -15 °C ~ 85 °C for common type, -25 °C ~ 85 °C for low temperature type, and -35 °C ~ 85 °C for ultra-low temperature type.

4.2.2 Storage environmental conditions The temperature of the storage environment is -40 °C ~ 35 °C; there shall be measures to prevent moisture and vibration; the storage environment shall be well ventilated, and no corrosive gas is allowed around.

4.2.3 Test environmental conditions If there are no other regulations, each test shall be carried out under the following climatic conditions: The test shall not be repeated. When it is required, a test is allowed after installation and before operation, and the test voltage value shall not exceed 80% of the specified voltage. The inspection test points of the drive shall conform to:

a) The main circuit and the control circuit share the same reference ground. The inspection test point is the power input terminal of the main circuit. Short-circuit the power input terminal during the test;

b) The main circuit and the control circuit do not share the same reference ground. The inspection test point includes the power input terminal and the control signal terminal of the main circuit. Short-circuit the power input terminal and the control signal terminal respectively during the test.

6.5 Insulation resistance

6.5.1 Technical requirements Under normal test conditions and the extreme low temperature conditions which are specified in the product-specific technical conditions, the insulation resistance between the motor stator winding and the shell, and between the inspection test point of the driver and the protective ground terminal (the exposed part of the shell) shall not be less than 50 MOmega; under extreme high temperature conditions, the insulation resistance shall not be less than 10 MOmega; the insulation resistance, after being subjected to a constant damp heat test, shall not be less than 2 MOmega. The voltage value of the insulation resistance meter that is selected for the insulation resistance check shall meet the requirements of Table 1.

6.5.2 Test method Perform the test according to

5.18.2 of GB/T 7345-2008. After the test, each loop shall be electrically connected to the grounded part to discharge it.

6.6 Insulation between winding turns

6.6.1 Technical requirements Use the impulse waveform comparison method to test the insulation between winding turns. The amplitude, oscillation period, waveform area difference and area of waveform difference of the test waveform shall meet the requirements of the product-specific technical conditions.

6.6.2 Test method

6.9.2 Test method After the motor reaches a stable non-operating temperature, use a resistance measuring meter to measure the DC phase resistance of the motor stator winding, or use other methods that can ensure accuracy to measure; convert it to the equivalent resistance value at 20 °C.

6.10 No-load speed

6.10.1 Technical requirements The motor runs in a steady state under no-load state; its no-load speed shall meet the requirements of the product-specific technical conditions.

6.10.2 Test method The motor is equipped with a dedicated driver to measure its no-load speed.

6.11 Rated data

6.11.1 Technical requirements When the motor outputs the rated torque, the system rated current (driver input current) and rated speed shall meet the requirements of the product-specific technical conditions.

6.11.2 Test method The motor is equipped with a dedicated driver, and applied with the rated torque, to measure the rated current and rated speed of the motor.

6.12 Operating voltage range

6.12.1 Technical requirements The speed-torque characteristics of the system within the operating voltage range shall meet the requirements of the product-specific technical conditions.

6.12.2 Test method Set the rated voltage of the system at the highest operating voltage and the lowest operating voltage respectively; test the maximum operating torque at different operating speeds under different operating voltages; the number of measurement points within the system speed range shall not be less than 10. Plot the speed-torque characteristic curve.

6.13 Speed adjustment range

6.13.1 Technical requirements The system shall be able to withstand the maximum operating heating test that is specified in

5.59 of GB/T 37123-2018.

6.17.2 Test method Assemble the system into an electrical driven compressor assembly. According to the air-conditioner full-operating-condition performance test parameter table of

4.2.3 in GB/T 37123-2018, select the maximum operating heating condition for the test. When the air-conditioner is stopped for 3 minutes, restart it for continuous operation for 1 hour; however, the overload protector is allowed to trip within the first 5 minutes of operation, and no action is allowed thereafter. If the overload protector does not reset within the first 5 minutes of operation, but does reset within 30 minutes of shutdown, it shall run continuously for 1 h. For the overload protector that is manually reset, if it trips within the first 5 minutes, it shall be reset forcibly after 10 minutes of tripping, and it shall be able to run for another 1 h thereafter.

6.18 Protection level

6.18.1 Technical requirements Assemble the system into an electrical driven compressor assembly; the enclosure protection class shall meet the requirements of

5.7.4 in GB/T 22068- 2018, where the drive enclosure protection class shall reach IP54. After the enclosure protection class test, the re-tested drive insulation resistance shall be greater than 50 MOmega; the re-tested drive insulation dielectric strength shall meet the requirements of 6.4.

6.18.2 Test method The system is tested in accordance with

6.6.11 of GB/T 22068-2018.

6.19 Internal cleanliness

6.19.1 Technical requirements The cleanliness of the motor shall meet:

a) The total mass of internal impurities shall not be greater than the value specified in Table 5;

b) The particle diameter of internal impurities shall not be greater than

0.25 mm.

6.19.2 Test method Test according to

6.6.1 of GB/T 22068-2018, or refer to Appendix A for test.

6.25 Mechanical strength

6.25.1 Technical requirements The drive shell shall not be deformed.

6.25.2 Test method Perform the test according to

6.7.1 of GB/T 22068-2018.

6.26 Temperature rise

6.26.1 Technical requirements Assemble the system into an electrical driven compressor assembly (or a dedicated compressor test device) for temperature rise test; the temperature rise of the motor shall meet the temperature rise limit specified in

8.10 of GB/T 755-2019. The temperature rise of the drive shall meet the requirements of

5.7.9 in GB/T 22068-2018.

6.26.2 Test method Perform the test according to

6.7.9 of GB/T 22068-2018.

6.27 Voltage fluctuation resistance

6.27.1 Technical requirements Assemble the system into an electrical driven compressor assembly (or a dedicated compressor test device), which shall be able to withstand the voltage fluctuation test that is specified in

6.9 of GB/T 22068-2018.

6.27.2 Test method Perform the test according to

6.9 of GB/T 22068-2018.

6.28 Noise

6.28.1 Technical requirements When it is required, the measured value of the single-point maximum noise of the system in the no-load state shall not be greater than the provisions of Table 7, or shall meet the requirements of the product-specific technical conditions. Assemble the system into an electrical driven compressor assembly (or a dedicated compressor test device), which shall be able to withstand the electrostatic discharge immunity test that is specified in

5.10.1.3 of GB/T 22068- 2018. 6.29.1.3.2 Test method The system is tested in accordance with

6.10.3 of GB/T 22068-2018.

6.29.2 Electromagnetic disturbance

6.29.2.1 Conduction disturbance 6.29.2.1.1 Technical requirements Assemble the system into an electrical driven compressor assembly (or a dedicated compressor test device), which shall be able to withstand the conduction disturbance test that is specified in

5.10.2.1 of GB/T 22068-2018. 6.29.2.1.2 Test method The system is tested in accordance with

6.10.2.1 of GB/T 22068-2018.

6.29.2.2 Radiation disturbance 6.29.2.2.1 Technical requirements Assemble the system into an electrical driven compressor assembly (or a dedicated compressor test device), which shall be able to withstand the radiation disturbance test that is specified in

5.10.2.2 of GB/T 22068-2018. 6.29.2.2.2 Test method The system is tested in accordance with

6.10.2.2 of GB/T 22068-2018.

6.30 Durability

6.30.1 Technical requirements Assemble the system into an electrical driven compressor assembly (or a dedicated compressor test device), which shall be able to withstand the durability test that is specified in

5.8 of GB/T 22068-2018.

6.30.2 Test method The system is tested in accordance with

6.8 of GB/T 22068-2018.

6.31 Reliability

a) Before the new product design is confirmed;

b) When the design or process of the identified product is changed;

c) When the key raw materials and components of the identified product are changed;

d) When the manufacturing site of the product is changed.

8.2.2 Number of prototypes Randomly select six prototypes from the batch of products, four of which are used for identification inspection, and the other two are kept for future use. When the number of finalized batch products is less than six, all of them shall be submitted for identification inspection. However, the number of prototypes for identification inspection shall not be less than two.

8.2.3 Inspection procedures The identification inspection items, basic sequence and prototype number shall be carried out in accordance with the provisions of Table 8 according to the product-specific technical conditions.

8.2.4 Evaluation of inspection results

8.2.4.1 Qualified If all items of the prototypes for identification inspection meet the requirements, the identification inspection is qualified.

8.2.4.2 Unqualified As long as any item of a prototype does not meet the requirements, the identification inspection is unqualified.

8.2.4.3 Accidental failure When the identification department confirms that a certain unqualified item of the system is an accidental failure of an isolated nature, it is allowed to take a spare prototype from the submitted prototypes every time to replace the failed prototype, and make up all the items before the failure (including the failure). Then, continue the test; if any item of another prototype does not meet the requirements, the identification inspection is unqualified.

8.2.4.4 Performance degradation After the prototype has undergone the environmental test, performance degradation that does not affect its use is allowed; the allowable value of The items and basic sequence of Group A inspection shall be in accordance with Table 8. Group A inspection can be sampled or carried out one by one. Sampling is carried out according to the single sampling plan in accordance with the inspection level II in GB/T 2828.1-2012; the acceptance quality limit (AQL value) is negotiated and selected by the user and the manufacturer. During the one-by-one inspection, if one or more items of the system is/are unqualified, the system shall be a non-conforming product. If the group A inspection is qualified, the user shall receive the whole batch, except for the unqualified system in the sampling. If the group A inspection is unqualified, after the defect is eliminated and the unqualified products are removed, the group A inspection shall be submitted again.

8.3.3 Group C inspection

8.3.3.1 Items and basic sequence of Group C inspection The items and basic sequence of Group C inspection shall be in accordance with Table 8.

8.3.3.2 Inspection timing and period In any of the following situations, Group C inspection shall generally be carried out:

a) Inspection of related items;

b) When there is a large deviation between the group A inspection results and the identification inspection results;

c) Periodic inspection. Unless otherwise specified, it shall be carried out at least once every two years;

d) When the government or industry regulates product quality or when the user requires.

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